Identifying Aquatic Insect Larvae

The video tutorial provides an in-depth look at various groups of beetles and flies, focusing on their characteristics, habitats, and sensitivity to pollution. It covers water pennies, riffle beetles, whirligig beetles, dobson flies, and true flies, including midges and crane flies. The tutorial also offers techniques for identifying these insects based on physical features and pollution tolerance.

What percentage of all animals on Earth are beetles?

• 10%

• 25%

• 75%

• 50%

Which beetle group is known for looking like small copper pennies?

• Riffle beetles

• Water pennies

• Whirligig beetles

• Corydalids

What unique feature helps identify riffle beetle larvae?

• Lateral filaments

• Operculum

• Pro legs with hooks

• Compound eyes

What is the distinctive swimming pattern of whirligig beetles?

• Figure eights

• Drunken circles

• Zigzag

• Straight lines

What is the common name for the larvae of dobson flies?

• Caddisflies

• Helgermites

• Mealworms

• Blood worms

Which feature distinguishes helgermite larvae from caddisfly larvae?

• One claw on pro legs

• Two claws on pro legs

• Lateral filaments

• Operculum

What color are midges known as blood worms?

• Green

• Blue

• Yellow

• Red

What is a key feature of crane fly larvae?

• Finger-like projections

• Operculum

• Lateral filaments

• Compound eyes

What shape do black fly larvae resemble?

• Beans

• Bananas

• Flax seeds

• Bowling pins

Which group of flies is most tolerant to pollution?

• Water pennies

• Riffle beetles

• Horse flies

• Corydalids